Accel is a vagabond gunman that was ambushed by a group of rough and tough guys in a town of outlaws. They tied Accel to a hot air balloon and let him loose in the skies, and he fainted. When he regained consciousness, Accel was in a flying castle and had a Power Stone in his hand. Feeling its power, his blood boils and his soul thirsts for justice. Accel than speeds his pace to find his way out and serve justice to those guys.